LINE VOLTAGE
TESTER
USER’S MANUAL
CT101
Please read this manual carefully and
thoroughly before using this product.
KEY FEATURES
• Visual indication of AC or DC voltage
• Easy to use
• UL approved
• Safe for CAT III 600V use
• Insulated housing
• Pocket clip on back
SAFETY
INSTRUCTIONS
DANGER
Electric
Shock Risk
Ꮨ Warning Ꮨ
To avoid possible electric shock or
personal injury, and to avoid damaging
the tester or the equipment being
tested:
• Do not use the CT101 in any way not
detailed in this manual or the tester's
safety features may be compromised.
• Never use the tester to detect the
presence of voltages higher than
500V (AC or DC).
• The CT101 may not detect the
presence of voltages lower than 80V.
Use caution whenever detecting AC
DANGER
Electric
Shock Risk
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voltages above 42VAC
RMS
or DC
voltages above 60VDC. Both pose a
shock hazard.
• Before using the tester, inspect the
case. Do not use the CT101 if the
case is damaged. Look for cracks or
missing plastic. Pay particular
attention to the insulation around the
connectors.
• Do not operate the tester around
explosive gas, vapor, or dust.
• When using the probes, keep your
fingers behind the finger guards.
Never touch the metal ends of the
probes when making a measurement.
OPERATING
INSTRUCTIONS
Follow the instructions for the type of
circuit you wish to test, using the
figures as a guide:
Three-Wire AC Grounded Outlets and
Power Strips/Cords
NEUTRAL
“HOT”
GROUND
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Insert one probe into the narrow (“hot”)
slot of the receptacle and the other into
the wide (neutral) slot. Either probe can
go into either slot. If the line is “hot”,
the orange neon bulb at the end of the
tester will glow.
To test whether the circuit is grounded,
insert one probe into the narrow (“hot”)
slot and the other into the ground slot.
Be sure to push the probe all the way
into the ground slot to be sure that it
makes contact. The neon bulb will glow
if the receptacle is grounded. Then test
between the wide (neutral) and ground
slots. The neon bulb should not glow.
Note: The CT101 cannot indicate the
quality of a ground, reversed ground
wiring, two hot wires in a circuit, or
more than one wiring fault.
Two-Wire AC Outlets
and Power Cords
Insert the probes into the
two slots. The neon bulb will glow if the
circuit is “live”. To determine which slot
is “hot”, insert one probe into the
narrow slot and touch the other probe
to the metal mounting screw. If the bulb
glows, the screw is grounded, the
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narrow slot is “hot”, and the wide slot
is neutral (grounded). If the bulb does
not glow, the screw is not grounded,
the wide slot is “hot”, and the narrow
slot is neutral.
Three-Wire 220VAC
Receptacles
Insert the first probe
NEUTRAL
into the round (neutral) hole and the
second probe into either rectangular
slot. If the bulb glows, that slot is “hot”.
Then move the second probe to the
other rectangular slot. If the bulb glows,
that slot is also “hot”. Finally, insert the
probes into both rectangular slots. The
bulb will glow more brightly to indicate
the presence of 220VAC.
SPECIFICATIONS
Voltage Detection Range:
80 to 500VAC/DC
Maximum Current: 0.3A @ 50/60Hz
Safety Rating: CAT III 600V
Lead Thickness: 18 AWG
Weight: 0.6 oz. (17g)
Operating Temperature: 41° to 104°F
(5° to 40°C) @ <80%RH
(<60%RH above 88°F/31°C)
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WARRANTY
INFORMATION
General Tools & Instruments’ (General’s)
CT101 Line Voltage Tester is warranted
to the original purchaser to be free from
defects in material and workmanship
for a period of one year. Subject to
certain restrictions, General will repair
or replace this instrument if, after
examination, the company determines
it to be defective in material or
workmanship. The warranty period
begins on the date of purchase. You are
encouraged to register your product
online. General will extend your warranty
an additional 60 days if you register at
www.generaltools.com/ProductRegistry.
This warranty does not apply to
damages that General determines to
be from an attempted repair by nonauthorized personnel or misuse,
alterations, normal wear and tear, or
accidental damage. The defective unit
must be returned to General Tools &
Instruments or to a General-authorized
service center, freight prepaid and
insured.
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Acceptance of the exclusive repair and
replacement remedies described herein
is a condition of the contract for
purchase of this product. In no event
shall General be liable for any
incidental, special, consequential or
punitive damages, or for any cost,
attorneys’ fees, expenses, or losses
alleged to be a consequence of any
damage due to failure of, or defect in
any product including, but not limited
to, any claims for loss of profits.
Register now at
www.generaltools.com/ProductRegistry
to receive a 60-day extension to your
warranty.
RETURN FOR REPAIR
POLICY
Every effort has been made to provide
you with a reliable product of superior
quality. However, in the event your
instrument requires repair, please
contact our Customer Service to obtain
an RGA (Return Goods Authorization)
number before forwarding the unit via
prepaid freight to the attention of our
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Service Center at this address:
General Tools & Instruments
80 White Street
New York, NY 10013
212-431-6100
Remember to include a copy of your
proof of purchase, your return address,
and your phone number and/or e-mail
address.
GENERAL TOOLS & INSTRUMENTS
80 White Street
New York, NY 10013-3567
PHONE (212) 431-6100
FAX (212) 431-6499
TOLL FREE (800) 697-8665
e-mail: sales@generaltools.com
www.generaltools.com
CT101 User’s Manual
Specifications subject to change without notice
©2013 GENERAL TOOLS & INSTRUMENTS
NOTICE - WE ARE NOT RESPONSIBLE
FOR TYPOGRAPHICAL ERRORS.
MAN# CT101
9/17/13
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